* {
  margin: 0;
  padding: 0;
  list-style: none; }

html, body {
  width: 100%;
  height: 100%;
  font-size: 62.5%; }

body {
  display: flex;
  flex-direction: column;
  justify-content: space-between; }

section {
  flex-grow: 1;
  overflow: auto; }

.section1 {
  width: 100%; }
  .section1 li {
    width: 100%;
    display: flex;
    height: 4rem;
    align-items: center;
    border-bottom: 1px solid gainsboro;
    justify-content: space-between; }
    .section1 li div {
      width: 33%;
      text-align: center; }
    .section1 li button {
      color: red; }

.section2 {
  width: 100%; }
  .section2 .li {
    border-bottom: 1px solid gainsboro; }
  .section2 li {
    width: 100%;
    display: flex;
    height: 4rem;
    align-items: center;
    justify-content: space-between; }
    .section2 li div {
      width: 33%;
      text-align: center; }
    .section2 li button {
      color: red; }

footer {
  width: 100%;
  height: 4rem; }
  footer ul {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between; }
    footer ul li {
      width: 50%;
      height: 100%;
      line-height: 4rem;
      text-align: center;
      border-top: 1px solid gainsboro;
      border-left: 1px solid gainsboro; }
      footer ul li a {
        width: 100%;
        height: 100%;
        text-decoration: none;
        color: black; }

.active1 {
  background: gainsboro; }
